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Bridge Assemblies

Deck Forming

Bridges that require concrete decks to be poured post precast erection will need to have forming onsite for casting.  Precast/Prestressed bridge girders can include blockouts, embedded inserts, embedded pipe for automated screed machines and other miscellanist items to help secure contractor provided formwork to girder.  Often (we coordinated with precaster) formwork can be installed prior to installation for exterior girders to allow faster construction.

View Assembly
Diagram showing steel girders in span with flange holes for connector-mounted hardware and boards on top for deck forming.

Tie Rod

Box beam and voided slab bridge spans use tie rod assemblies to fasten sets of girder together.  Tie rods can either be oriented perpendicular to girder edge or on an angle based on if the bridge is located in a curve.  Recesses located beam side faces allow access to complete tie rod connection assembly once rod has been extended through girder.

View Assembly
Tie rod assembly diagram showing exterior girders, interior girders, anchor plates, and solid sections between joints.

Rail Post

Rail post assemblies can be added to deck bulb tee girders.  Steel post assembly is cast into the deck bulb tee top flange with anchor bolts extending up.  Options for pouring the curb as a secondary pour at precast plant are available or curb can be cast onsite by contractor.

View Assembly
Rail Post Anchor Assembly diagram showing grouted posts cast into a curb with a rideable surface and deck bolt grader base.

Deck Forming

Bridges that require concrete decks to be poured post precast erection will need to have forming onsite for casting.  Precast/Prestressed bridge girders can include blockouts, embedded inserts, embedded pipe for automated screed machines and other miscellanist items to help secure contractor provided formwork to girder.  Often (we coordinated with precaster) formwork can be installed prior to installation for exterior girders to allow faster construction.

Tie Rod

Box beam and voided slab bridge spans use tie rod assemblies to fasten sets of girder together.  Tie rods can either be oriented perpendicular to girder edge or on an angle based on if the bridge is located in a curve.  Recesses located beam side faces allow access to complete tie rod connection assembly once rod has been extended through girder.

Rail Post

Rail post assemblies can be added to deck bulb tee girders.  Steel post assembly is cast into the deck bulb tee top flange with anchor bolts extending up.  Options for pouring the curb as a secondary pour at precast plant are available or curb can be cast onsite by contractor.

Bridge Design

  • Point of sale, design, manufacturing, and installation
  • Controlled manufacturing
  • Over 95% of labor is in a controlled manufacturing facility
  • Reduced site labor increases job safety
  • Accelerated construction
  • Erected upon completion of substructure
  • Year-round casting and installation
  • Higher-strength concrete
  • Fire resistance
Aerial view of two angled concrete barriers placed across a multi-lane highway during road construction. Crane lifts concrete bulb tee girder onto highway overpass during construction, with workers on the structure. Aerial view of highway interchange under construction, showing concrete overpass structures and curving roads with surrounding landscape. A crane lifts a wide-flange steel girder into position beside an already-installed girder at a bridge construction site, with workers in orange safety gear nearby. Construction site showing a white flatbed truck carrying a long steel beam, with a yellow crane operating nearby and a forested hillside in the background. Aerial view of a bridge under construction with a large crane lifting components, workers on site, and a residential neighborhood in the background. Crane lifting a large concrete bridge girder with steel bearing pads, set against a blue sky with trees.

3D Viewer

3D Viewer Tools and Functions:

  • 3D Viewer Functions:
  • Move, span, zoom assemblies
  • Isolate single components in view
  • Explode assembly single components
  • Use markup to sketch details
  • General measurements for concept
  • Print views

See Related Product Pages Below

Need More Info?

We Are Here to Help

 

Have a question, need a budget or detailed schedule?  Knife River sales team is ready to discuss precast solutions for your project.  Reach out to our staff below :

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Andy Roberts

Outside Sales, ID & MT

phone

509.904.8610
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Nikolaus Mixon

Outside Sales, OR & CA

phone

541.257.7412
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Alex Sari

Outside Sales, WA & AK

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(509) 992-5614

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Featured Products

All Products

Bulb I

The Bulb I (BI51, BI63 and BI75) is a less commonly used ODOT standard girder for medium to long length span bridges. It utilizes the BT section with the deck blocked in to achieve difficult site requirements such as heavy super elevations and vertic...

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A black I-beam cross-section shape on a white background, representing a structural steel beam used in construction.

Box Beam

Box Beams are typically used for 80′-118′ bridge spans. The design allows for a typical 4′ width section to include integral voids which reduce the product weight and are often used when box depth and speed of construction are part ...

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A black rectangular frame with a white cutout center, resembling a SIM card tray or photo frame.

Bridge Substructure

Accelerated Bridge Construction utilizes precast bridge substructure products. Total precast abutments, bent caps, pile caps and wingwalls offer many advantages. They can be precast to precise specifications of the design in a plant controlled settin...

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Tapered single-cell box girder cross section showing the narrowed lower portion connecting to the pier.

Voided-Solid Slabs

Voided Slabs are typically used for 15-85′ bridge spans but can be used in building applications where significant design loads are required. Voided slab design allows for a typical 4′ width slab to include integral voids which reduce the...

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Black slab with two circular voids illustrating a voided-solid slab design.

AASHTO Girder

AASHTO sections are typically used for railroad, or other private entity, bridge construction when a standard wide flange (WF) girder section does not meet the project design criteria.  The top flange of AASHTO shaped girders is not as wide as standa...

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Black dumbbell icon on white background

Bulb T

The Oregon Bulb-Tee (BT) girder is the preferred choice for most Oregon medium to long span bridges requiring a CIP deck. Bulb Tee precast/prestressed girders are typically used in spans from 60-185′ with significant loading.

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Bold black uppercase serif letterform T on a white background.

Deck Bulb Tee

Deck Bulb Tee Girders combine a precast deck with the traditional I-Girder design. This design offers the advantage of an immediate driving surface, or alternatively, a roughened surface that allows for the addition of a secondary overlay or a Cast-I...

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Deck bulb tee: a steel structural component with a top flange, tapered stem, and bulb-shaped foot.

Tri-Deck

Tri-Deck girders are an adjustable top flange width, multi-stemmed unit designed for full deck use. Tri-Deck bridges are typically used for bridge spans from 30′-52′ which require a longer span and lower profile section. Typically Tri-Dec...

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Tri-Deck structure with three vertical supports beneath a horizontal beam.

Featured Finishes

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Form Finish

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Acid Etch

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